Pump



Feb. 21, 1928.

C. W. HERRIN PUMP 3 Sheets-Sheet 1 a? 1 1 z z 1 4/ Id nL 6 1/ I. v 3/ m. m 3 p. H. 4 2 0M. W. 4 2 8 a 1 v 2 PW w s U k W m f Feb. 21, 1928.

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1,660,303 c. w. HERRIN PUMP Filedvhse t. 4, 1925 3 Sheets-Sheet 2 Emma:

Feb. 21, 1928. 1,660,303

c. w. HERRIN PUMP Filedhsjpt v 1925 s Sheets-Sheet a "ammm; Char-2e: WJferrzPv,

Witness: I w,

Patented Feb. 21, 1928.

UNITED STATES PATENT OFFICE.

CHARLES w. HERRIN, OF KANSAS CITY, MISSOURI, ASSIGNOR or ONE-HALF T CLAYTON BELL, or KANSAS CITY, MIssoURI.

PUMP.

In pumping'oil and other deep'wells the leather packing cups upon the plunger head of the pump soon become worn out from frictional contact with the pump barrel and the abrasive action of the sand and other debris pumped from the well with the fluid. Heretofore it has been customary to remove the entire plunger from the well for the purpose of replacing the packing cups, which operation causes considerable delay and expense, as the diflerent sections comprising the plunger rod must be uncoupled while being removed from the well, and recoupled as the plungeris lowered to working position in the well. The deeper the well the greater the delay and expense in removing and replacing the plunger, owing to the large number of sections constituting the plunger rod. By the use of my invention the plunger head only need be removed for replacement of the worn out leather packing cups, which operation can be accomplished in a small fraction of the time required for removing the plunger rod.

In order that my invention may be fully understood, reference will now be had to the accompanying drawings, in which:

Fig. 1 is a fragmentary vertical section of the pump barrel, Showing a portion of the interior mechanism. employed in carrying out the invention.

Fig. 2 is a continuation of Fig. 1.

Fig. 3 is a continuation of Fig. 2.

Fig. 4 is a cross section on line 44 of Fig. 1.

Fig. 5 is a cross section on line 55 of Fig. 1.

Fig. 6 is a cross section on line 6-6 of Fig. 2.

Fig. 7 is a cross section on'line 7-7 of Fig. 3. V

Fig. 8 is a broken vertical section of a sleeve and a clamp constituting important features of the invention.

Fig. 9 is a broken elevation of atubular fitting connected, to the lower end of the pump barrel.

Fig. 10 is a disassembled elevation of the lower portion of the plunger rod.

Fig. 11 is an inverted plan view of a strainer arranged at the lower end of the pump.

Referring now in detail to the different parts, 2 designates the pump barrel which is of ordinary construction and supported-at 1ts upper end by the tubing, not-shown, in the usual manner.

The lower. end of the pump barrel 2, Fig. 2, is threaded into or otherwise removably connected to a tubular fitting 4, which is provided intermediate its ends with a peripheral groove 6 and at its lower portion with slots 8, for the entrance of oil orother fluid. The lower end of the fitting 4'is provided with four equally spaced guides 10, which taper downwardly to a common point 12 for a purpose which will hereinafter appear.

14 designates a strainer adapted to slip over the barrel 2 and the fitting 4. Said strainer 14 is provided near its upper end with a peripheral shoulder 16 which fits freelywithin the well casing A. The lower end of the strainer 14 has a pair of perforated valves '18 hinged at 19 and normally held in closed, position by springs 20, Figs. 3 and 11; The valves 18 are provided with interior ribs 22 which contact the guides 10 and push said valves open when the strainer 14 is slipped upwardly overthe fitting 4 and the barrel 2. During upward or downward movement of the strainer 14 the ribs 22 ride against the exterior of the barrel 2 and the fitting 4. The upper end of the strainer 14 is threaded or otherwise removably confiected to a chuck 24, which, like said strainer, is adapted to slide over the barrel 2 and the tubular fitting 4. The chuck 24 is provided with one or more pivotally mounted dogs 26 adapted to enter a groove 6 extending peripherally around the fitting 4, as disclosed by Figs. 3 and 7 ,and thus secure said chuck 24 to the fitting 4. The'dogs 26 are reliably held in the groove 6 by a tubular clamp member 28, the lower beveled edge of which engages said dogs 26 and forces them into the groove 6. The upper portion of the clamp 28 is provided with peripheral collars the usual function of preventing backward 30 and 32 for engagement by an elevator mechanism similar to that disclosed by my application filed July 6, 1925, Serial No. 41,-

660. The tubular clamp member 28 is held flow of the oil or other fluid sucked into the barrel 2 by the plunger. i

42 designates the plunger rod which is actuated from the top of the well in the usual manner, as by a pump jack, not shown, and extends down into the lower portion of the pump barrel 2. The lower portion 44 of said rod 42 is of tubular form so that oil or. other fluid maypass upwardly therethrough on each downward stroke of the plunger and escape through one or more ports 46 intoa sleeve 48, Figs. 1, 2 and 8, constituting an important featureof the plunger head. The

upper closed end of the tubular portion 44 of the rod 42 is reduced andthreaded into a coupling 50, Figs. 1 and 10, the upper end of which receives the lower threaded end of a union 52, the reduced upper end of which latter is threaded into one of the sections 54 of the plunger rod; i z i i The coupling has one or more longitudinal slots 56 to receive a like number of dogs 58, which are pivotallymounted within the sleeve 48 for the purpose of detachably connecting said sleeve to the plunger rod 42. The adjacent ends of the threaded portions 60 and 62 of the tubular portion 44 and the union 52, respectively, of the rod 42 are tapered to form an annular recess for thereception of the dogs 58, Figs. 1 and 4.

The sleeve 48 is adapted to he slipped over the rod'42, sc that the sameneed not be lifted from the welliwhen new leather or other suitable packing cups 92 are to be applied to said sleeve. When thesleeve 48 is '7 lowered over the rod 42, it is turned axially byv guidemeans 64 and 66 to cause thedogs 58 to register with the slots 56, so thatthe fornher may pass through the latter and engage the tapered ends of the threaded portion 60 and 62. The guide means 64 are formed on the plunger rod 42 and consist of upwardly tapered elements, while the guides 66 are in the form of lugs formed integral with the interior of the sleeve 48 and adapted to enter recesses 68 at the adjoining lower portions of said guides 64.

The dogs 58 are reliably held in contact with the tapered ends of the threads 60 and 62 by an annular clamp 7 0, so that the sleeve 48 and the parts mounted thereon will reciprocate with the rod 42 when the pump is in r 1. i r

the sleeve 48 on the downward stroke of the plunger rod 42 unseats a check valve 82 and escapes into the barrel 2 through one or more ports 84 in said sleeve 48. The check valve 82, which closes on the upwardstroke of the plunger, is reciprocably mounted upon the plunger rod, the reciprocablermovement being restricted by the valve seat88 at the bottom of the ports 84, anda flange'90 arranged at the top of said portsi84 and within the sleeve 48, Figs. 1 and 8. i i i The plunger head consists of the sleeve 48, packing cups 92, andspacingt elementsw94 arranged alternately with said cups 92 upon the exterior of the sleeve 48. The cups 92 may consist of any suitable material as leather and, together. with'the spacing elements 94, are held in position by a nut 96 threaded upon the lower portion of said 7 sleeve 48 and. which, on being tightened,

forces the uppermost cup 92 against a peripheral shoulder 98 on the sleeve 48. The V packing cups 92 fit snugly within the barrel 2 and perform the usual function of suckin up the oil or other fluid at each upwar stroke of the plunger.

1.The elevator mechanism for raising and lowering the plunger and the strainer 141are duplicates of each other, excepting that the one for engaging over the collars 30 and 32 of the clampmember 28 is larger than the one for engaging over the shoulders 7 8 and 80 of the clampzxmember 70. Theelevator mechanisms may be of any suitable type, but

in Fig. 1, I have shown anelevatormechanism of the type disclosed by my copending application'liereinbefore referred to. As-the elevator mechanism is fully described in m aforementioned application I deem it su cient in the present instance tostate that said elevator .mechanism embodies one or more dogs 150 mountedron a ring 152 slidably mounted within a tubular jacket 154. The upper. reduced.portionofthe ring 152 slidably fits within the lower portion of; the a nut 156 which has a sliding fit in the jacket 154. The nut 156 is provided with aninternal nut 158, which, when adjusted upwardly, permits the upper ends of the dogs .150 to pass inside of the nut 156 and be locked thereby in inactive position as shown on The nut 156 is slidably mountedupon a plunger 160 which is slidably mounted in the jacket 154 and provided at its upper end with eyes 162 to which a cable 164 is attached for raising and lowering the elevator mechanism. The plunger 160 is of tubular form so that it may slide up and down with the jacket 154 upon the plunger rod 42.

Preparatory to pumping oil or other filllCl the rod 42 is equipped with a removable plunger head and the chuck 24 is provided with the strainer 14. hen the packing cups 92 become worn out through the operation of the pump and due to the abrasive action of the sand and other dbris in the well, the elevator mechanism is properly ad'- justed and lowered over the rod 42 until the jacket 154 rests upon the shoulder 49 at the upper portion of the sleeve 48, which is a signal to the workmen that the elevator mechanism is ready to be lifted to the surface. As the elevator mechanism is lifted the lower ends of said dogs 150 are forced into engagement with the underside of the collar 78 at the upper end of the clamp member 70, which latter on being lifted by the dogs 150, lifts the plunger sleeve 48 and the parts mounted thereon. The upward movement of the clamp frecsthe dogs 78, so that they can slide out of engagement with the tapered end of the threaded portion 62 and the tapered upper ends of the slots 56 in the coupling 50. On the plunger head being lifted to the surface it may be removed from the rod 42, and the worn out packing cups 92 can then be readily replaced with others. The plunger is then replaced over the rod 42 and lowered by the elevator mechanism, the dogs 150 of which are adjusted into engagement with theunderside of the collar by the clamp member 70. The clampTO and the elevator mechanism continue to descend until the lugs 66 engage the bottom of the recesses 68 and thereby support the plungerhead. The elevator mechanism continues to move dowwnardly until the lower ends of the dogs 150 engag the beveled upper end 51 of the plunger sleeve 48, which throws the dogs out of engagement with the collar 80 so that the elevator mechanism may be lifted to the surface without lifting the plunger head therewith. When the dogs 150 are disengaged from the collar 80 the clamp 70 is forced downwardly by the force of gravity and the coil spring 72, and in turn forces the dogs 58 through the slots 56 and into contact with the tapered ends of the threaded portions 60 and 62, thereby reliably securing the plunger head to the plunger rod. The pump is then ready for operation.

From the foregoing description, taken in connection with the drawings, it is apparent that I have provided mechanisms whereby the advantages above pointed out are ex peditiously and economically attained, and

whileI have shown and described one form of said mechanisms I reserve theright to all such modifications thereof as properly fall ,within the spirit and scope of the appended lowering and raising said member independently of the plunger rod, a packing element mounted upon said me1nber,and means for locking the plunger rod and said member together. v

2'. In an apparatus of the character described, a plunger rod, a sleeve removably mounted upon said plunger rod, interlocking means for securing said sleeve upon the plunger rod, and guide means associated with the plunger rod for turning the sleeve to adjust the interlocking means to active position.

3. In an apparatus of the character described, a plunger rod, a sleeve removably mounted upon said plunger rod, means for lowering and raising said member independently of the plunger rod, a packing element mounted upon said sleeve, and pivoted means for securing said sleeve and the plunger rod together.

v4. In an apparatus of the character described, a plunger rod, a plunger head arranged to slip over said plunger rod, means for lowering and raising said plunger head 7 independently of said plunger rod, and dogs for securing said plunger head and the plunger rod together.

5. In an apparatus of the character described, a plunger rod, a plunger head arranged to slip over said plunger rod, means for lowering and raising said plunger head independently of said plunger rod, dogs for securing said plunger head and the plunger rod together, and means for securing said .dogs in active position.

6. In an apparatus of the character described, a plunger rod, a tubular plunger head adapted to slip over said plunger rod, means for lowering and raising said plunger head independently of said plunger rod,

means'for securing said plunger head upon the plunger rod, and clamp means for holding said securing means in active position.

7. In a pump of the character described, a plunger rod, a plunger headconsisting of a hollow member which may be slipped over the plunger rod-without removing the latter from working position, means for lowering and raising said plunger head independently of said plunger rod, packing elements mounted upon said. hollow member and adapted to engage-the inner surface of the pump barrel, members for holding said packing elements in spaced relation upon said hollow member, and means threaded upon the hollow member for holding the packing elements andthe spacing members in position upon said hollow member.

8. In a pump of the character described, a plun rod embodying two elements having threaded portions with adjacent tapered ends, a coupling connecting said threaded portions and having slots adjacent to said tapered ends, a plunger head removably mounted upon said plunger rod, and dogs pivoted to said plunger head and adapted to extend through the slots and engage said tapered ends.

9. In a pump of the character described, a plunger rod embodying two elements having threaded portions with adjacent tapered ends, a coupling connecting said threaded portions and having slots adjacent to said tapered ends, a plunger head removably mounted upon said plunger rod, dogs pivoted to said plunger head and adapted to extend through the slots and engage said tapered ends, and clamp means for holding said dogs against said tapered ends.

10. In a pump of the character de a plunger rod ei'nbodying two elements having threaded portions with adjacent tapered ends, a coupling connecting said threaded portions and having slots adjacent to said tapered ends, a plunger head reniovably mounted upon said plunger rod, dogs pivoted to said plunger head and adapted to extend through the slots and engage said ta-- pered ends, and guide means on the plunger rod and the plunger head for adjusting the same so'that the dogs may enter the slots.

11. In a pump of the character described, a plunger rod embodying two elements having threaded portions with adjacent tapered ends, a coupling connecting said threaded portions and having slots adjacent to said tapered ends, a plunger head removably mounted upon said plunger rod, dogs pivoted to said plunger head and adapted to extend through the slots'andengage said tapered ends, tapered guide means on the plunger rod, and a lug on the plunger head for counting with said guide means in adjusting said plunger head in position to permit the dogs to enter the slots.

12. In a pump of the character described, a plunger rod having a tubular portion with a port, a tubular plunger head mounted upon said plunger rod-and provided with a port adjacent to the port in the plunger rod, and a valve interposed between said ports. 7 l i 13. In a pump ofthe character described, a plunger rod having a tubular portion with a port, a tubular plunger head mounted upon said plunger rod and provided with a port adjacent to the port in the plunger rod, and a check valve slidably mounted cribed,

- ranged to slip over said plunger rod, means .i'or securing Silltl plunger head in Working position upon said plunger rod, clamp means associated with the barrel .t'or holding the securing means in active position, and mechanism for raising and lowering said clamp means and the plunger head independently of the plunger rod.

16. In a pump of the character described, a pump barrel, a strainer adapted to slip ever said barrel, and means for securing said strainer in active position. 17'. In a pump of the character described", a pump barrel, a strainer adapted to slip over said barrel, a chuck secured to said strainer and adapted to slip over the barrel,

and a dog for securing said chuck in working position. i

18. In a pump otthe character described, a pump barrel, a strainer adapted to slip over said barrel, a chuck secured to said strainer and adapted to slip over the barrel, a dog for securing said chuck in working position, and clamp means for s curing said dog in active position.

19. In a pump ofthe character described, a pump barrel, a strainer adapted tojslip over said barrel, a chuck secured to said strainer and adapted'to slip over thebarrel, dogs for securing said chuck in working position, clamp means for securing said dogs in active position, and means for lowering and raising said clamp means.

ill)

llll) 20. In a pump of the character described,

a pump barrel, a strainer adapted to slip over said barrel, means'for securing said strainer in active position, self-closing valves at the lower portion of the strainer, and means connected to the barrel for opening said valves when the strainer is slipped upwardly over the pump barrel.

21. In a pump of the character described, a plunger rod, a plunger head arranged to slip over said plunger rod, means for securing said plunger head upon the plunger rod, clamp means for holding said seeming means in active position and which is loosely connected to the plunger head, a dog for rais ing and lowering the clamp means and the plunger head, a ring encircling the plunger rod and upon which said dog is freely mounted, and a jacket enclosing said ring and provided with means for adjusting said dog to active position.

22. In a pump of the character described, a plunger rod, a plunger head arranged to slip over said plunger rod, means for securing said plunger head upon the plunger rod, clamp means connected to the plunger head for raising and lowering the latter and which is adapted to hold said securing means in active position, a dog for raising and lowering the clamp means, a ring encircling the plunger rod and upon which said dog is freely mounted, a jacket enclosing said ring and provided With means for adjusting said dog to activeposition, and a member in said jacket Which is movable in one direction to hold the dog in active position and movable in a reverse direction to release said dog.

In testimony whereof I alfix my signature.

CHAJRLES W. HEREIN.v 

